DSPIC33FJ16GS502-H/SP - 16-bit 50MHz 16KB Flash DSP | Microchip
MPN: DSPIC33FJ16GS502-H/SP ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.95 | $5.95 |
| 10 | $5.36 | $53.60 |
| 100 | $4.77 | $477.00 |
| 500 | $4.18 | $2,090.00 |
| 1,000 | $3.58 | $3,580.00 |
DSPIC33FJ16GS502-H/SP Overview
A Digital Signal Controller (DSC) is a hybrid device that combines the deterministic interrupt response and peripheral set of a microcontroller with the multiply-accumulate (MAC) capability of a DSP. In the component taxonomy, the DSPIC33FJ16GS502-H/SP sits as: DSC -> dsPIC33F family -> SMPS/Digital-Power sub-family -> 16-bit Flash controller -> semiconductor. By integrating MAC hardware on a modified Harvard bus, a single DSC replaces the conventional MCU-plus-external-DSP pair used in legacy digital power designs, reducing BOM cost and board area while accelerating the control-loop closure time.
Key features include 21 I/O pins, four 16-bit PWM channels with 1.04 ns resolution at 40 MIPS, a 10-bit 2 Msps ADC with up to 12 input channels, four high-speed analog comparators with programmable reference, a 16-bit timer, I2C/SPI/UART communication peripherals, and an internal 7.37 MHz oscillator with PLL. The on-chip Flash supports self-programming under firmware control, which allows in-field firmware updates without external programming hardware.
Architecturally, the device uses a 16-bit modified Harvard core with a hardware DSP engine (40-bit accumulator, single-cycle MAC) and dual-ported Flash that allows DMA-style instruction fetch in parallel with data access. This dual-fetch scheme is what lets the part sustain 40 MIPS while still servicing high-frequency PWM and ADC events without CPU stalls.
Typical applications include isolated and non-isolated DC/DC converters, Power Factor Correction (PFC) stages, AC/DC power supplies, uninterruptible power supplies (UPS), solar micro-inverters, LED drivers, and digital welding or induction heating control. The dedicated PWM/ADC/comparator peripheral set is specifically tuned for voltage-mode and current-mode control loops.
Designers should plan for a 4-layer PCB with a ground pour under the SPDIP body to manage switching noise; the high-speed ADC tracks should be routed as short, guarded differential pairs when used for current sensing, and the AVSS/AVDD pins must be decoupled with separate ferrite-bead-isolated rails from the digital VDD.
This page consolidates distributor pricing, cross-package notes for the -H/SP SPDIP, and drop-in alternatives from the dsPIC33F SMPS family not found on a single manufacturer page.
Drop-in alternatives for DSPIC33FJ16GS502-H/SP — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with DSPIC33FJ16GS502-H/SP (same form factor and footprint) — differing in ADC, Analog Comparators, Mounting Type, Package, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ16GS502-I/SP
✅ Drop-In✓ In Stock
$3.18 / Unit
View Datasheet →DSPIC33FJ16GS502-50I/SP
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ16GS504-I/SP
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ16GS402-I/MM
✅ Drop-In✓ In Stock
$2.55 / Unit
View Datasheet →DSPIC33FJ16GS402-H/SP
✅ Drop-In✓ In Stock
$4.1 / Unit
View Datasheet →DSPIC33FJ16GS402-50I/SP
✅ Drop-In✓ In Stock
$2.85 / Unit
View Datasheet →DSPIC33FJ16GS502-H/SP Maximum Ratings & Electrical Characteristics
| Product Family | dsPIC33F SMPS Digital Signal Controllers |
| Core Architecture | 16-bit dsPIC33F Modified Harvard with DSP Engine |
| Maximum CPU Speed | 50 MIPS (40 MIPS typical at 3.3 V) |
| Program Memory | 16 KB Flash |
| Data RAM | 2 KB |
| Supply Voltage (VDD) | 3.0 V to 3.6 V |
| I/O Pins | 21 |
| Package | 28-pin SPDIP (Skinny Plastic DIP) |
| Temperature Grade (H suffix) | -40C to +150C |
| ADC | 10-bit, up to 2 Msps, up to 12 channels |
| Analog Comparators | 4 high-speed comparators with programmable reference |
| PWM Channels | 4 x 16-bit with 1.04 ns edge resolution at 40 MIPS |
| Communication Peripherals | I2C, SPI, UART |
| Oscillator | Internal 7.37 MHz with PLL (up to 80 MHz) |
| Mounting Type | Through-Hole (SPDIP) |
| MSL Level | 1 (unlimited) |
| RoHS Status | Compliant |
DSPIC33FJ16GS502-H/SP Pin Configuration
| Pin 1 | MCLR — Master Clear (reset) input, active-low |
| Pin 2 | RA0 — I/O port A bit 0 / analog input |
| Pin 3 | RA1 — I/O port A bit 1 / analog input |
| Pin 4 | RA2 — I/O port A bit 2 / analog input |
| Pin 5 | RB0 — I/O port B bit 0 |
| Pin 6 | RB9 — I/O port B bit 9 |
| Pin 7 | RB10 — I/O port B bit 10 |
| Pin 8 | VSS1 — Digital ground reference 1 |
| Pin 9 | RB1 — I/O port B bit 1 |
| Pin 10 | RB2 — I/O port B bit 2 |
| Pin 11 | RB3 — I/O port B bit 3 |
| Pin 12 | RB4 — I/O port B bit 4 |
| Pin 13 | VDD1 — Digital supply 1 (3.0-3.6 V) |
| Pin 14 | RB8 — I/O port B bit 8 |
| Pin 15 | RB15 — I/O port B bit 15 |
| Pin 16 | RB5 — I/O port B bit 5 |
| Pin 17 | RB6 — I/O port B bit 6 / PWM |
| Pin 18 | RB7 — I/O port B bit 7 / PWM |
| Pin 19 | AVSS — Analog ground |
| Pin 20 | AVDD — Analog supply (3.0-3.6 V) |
| Pin 21 | RB11 — I/O port B bit 11 |
| Pin 22 | RB12 — I/O port B bit 12 |
| Pin 23 | RB13 — I/O port B bit 13 |
| Pin 24 | RB14 — I/O port B bit 14 |
| Pin 25 | OSC1 — Crystal oscillator input |
| Pin 26 | OSC2 — Crystal oscillator output |
| Pin 27 | VSS2 — Digital ground reference 2 |
| Pin 28 | VDD2 — Digital supply 2 (3.0-3.6 V) |
Typical Applications
DSPIC33FJ16GS502-H/SP is suitable for 6 applications: Isolated DC/DC Converter Control, Power Factor Correction (PFC) Stage, AC/DC Power Supply with DSP Loop, Uninterruptible Power Supply (UPS) Controller, Solar Micro-Inverter, Industrial Motor Drive / LED Driver.
Isolated DC/DC Converter Control
The DSPIC33FJ16GS502-H/SP suits isolated DC/DC converters such as quarter-brick intermediate-bus converters where a 50 MIPS core executes peak-current-mode control loops at 200-500 kHz switching frequency. Its 4-channel 16-bit PWM with 1.04 ns edge resolution directly drives the primary-side MOSFET bridge and synchronizes the secondary-side synchronous rectifier timing. The on-chip 10-bit 2 Msps ADC samples the primary current shunt and output voltage feedback with sub-microsecond latency, while the four analog comparators implement hardware cycle-by-cycle over-current protection that bypasses the CPU entirely. The -H temperature grade (-40C to +150C) allows placement next to the power magnetics without thermal derating. This makes the part a strong fit for telecom 48 V input, server and industrial 24 V bus converters.
Recommended
Power Factor Correction (PFC) Stage
The DSPIC33FJ16GS502-H/SP is well-matched to boost PFC front-end stages operating in continuous conduction mode at 70-130 kHz. The 50 MIPS throughput runs the average-current-mode control law plus input voltage feed-forward and AC-line zero-crossing detection within a tight sub-20 microsecond control period. Its dedicated PWM can be split between the boost switch and an inrush relay or auxiliary supply driver, while the comparator subsystem triggers cycle-by-cycle current limiting during transients. The 16 KB Flash accommodates look-up tables for THD optimization and adaptive gain scheduling, and 2 KB RAM is sufficient for state variables and per-cycle history. The -H grade is appropriate for outdoor LED lighting drivers and industrial motor-drive enclosures exceeding +85C ambient.
Recommended
AC/DC Power Supply with DSP Loop
The DSPIC33FJ16GS502-H/SP's modified-Harvard 16-bit core executes voltage-mode and peak-current-mode firmware in offline AC/DC adapters, server PSUs, and open-frame industrial supplies. The 50 MIPS instruction rate closes the output voltage feedback loop inside one switching period (typically 10-20 us at 50-100 kHz), supporting digital soft-start, constant-current/constant-voltage (CC/CV) transitions, and dynamic load response compensation. The UART/SPI/I2C peripherals expose PMBus-style telemetry for monitoring output voltage, current and temperature. The -40C to +150C operating range covers server-room ambient plus self-heating under load. Pin-compatible firmware can be scaled up to the DSPIC33FJ16GS504 family when larger firmware images or extra logging buffers are needed.
Recommended
Uninterruptible Power Supply (UPS) Controller
The DSPIC33FJ16GS502-H/SP serves as the digital control brain in line-interactive and online UPS systems where it manages inverter PWM, battery charging profile and AC-output voltage regulation in real time. Its four PWM channels drive the H-bridge inverter MOSFETs at 20-50 kHz with hardware dead-band insertion, while the 10-bit ADC samples battery voltage, load current and AC-mains voltage simultaneously through its multiplexed input channels. The hardware comparators provide instantaneous over-current detection that forces PWM shutdown independent of firmware latency. The -H temperature grade tolerates the sealed lead-acid battery compartment environment that regularly exceeds +60C ambient. 16 KB Flash accommodates charger state-machine plus inverter modulation tables for pure sine-wave synthesis.
Recommended
Solar Micro-Inverter
The DSPIC33FJ16GS502-H/SP is suitable for grid-tied solar micro-inverters in the 200-400 W range where maximum power point tracking (MPPT) and anti-islanding must run every switching cycle. Its 50 MIPS core executes perturb-and-observe MPPT plus grid-synchronization PLL in firmware, while the dedicated PWM channels drive the high-frequency push-pull stage. The internal PLL multiplies the 7.37 MHz oscillator to support precise 50/60 Hz grid-synchronized output. The -H grade supports rooftop outdoor enclosures reaching +70C ambient plus self-heating from the power stage. 2 KB RAM holds MPPT state, instantaneous grid voltage samples and current-loop variables, while 16 KB Flash fits the MPPT algorithm, grid-protection logic and Modbus telemetry stack.
Recommended
Industrial Motor Drive / LED Driver
The DSPIC33FJ16GS502-H/SP controls BLDC and PMSM motors in industrial automation, including field-oriented control (FOC) loops running in firmware at 10-20 kHz with sinusoidal PWM outputs. The same SMPS peripheral set drives high-power LED strings with constant-current regulation and dimming via analog or PWM input, supporting dim-to-warm and color-mixing strategies. The 4-channel PWM hardware generates complementary outputs with programmable dead-band for three-phase motor inverter legs without external logic. The 10-bit ADC reads back-phase currents and DC-bus voltage for closed-loop control. The -H grade (-40C to +150C) supports integration into motor housings and outdoor LED fixtures where ambient temperature regularly exceeds +85C.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ16GS502-H/SP — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ16GS502-I/SP | DSPIC33FJ16GS502-50I/SP | DSPIC33FJ16GS504-I/SP | DSPIC33FJ16GS402-I/MM | DSPIC33FJ16GS402-H/SP |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-pin SPDIP | 28-pin SPDIP - same | 28-pin SPDIP - same | 28-pin SPDIP - same | 28-pin SPDIP - same | 28-pin SPDIP - same |
| Program Memory | 16 KB Flash | 16 KB Flash | 16 KB Flash | 32 KB Flash (+100%) | 8 KB Flash (-50%) | 8 KB Flash (-50%) |
| Data RAM | 2 KB | 2 KB | 2 KB | 4 KB (+100%) | 1 KB (-50%) | 1 KB (-50%) |
| Maximum CPU Speed | 50 MIPS | 50 MIPS | 50 MIPS | 50 MIPS | 50 MIPS | 50 MIPS |
| Temperature Grade | -40C to +150C (H) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +150C (H) |
| PWM Channels | 4 x 16-bit | 4 x 16-bit | 4 x 16-bit | 4 x 16-bit | 4 x 16-bit | 4 x 16-bit |
| ADC | 10-bit, 2 Msps | 10-bit, 2 Msps | 10-bit, 2 Msps | 10-bit, 2 Msps | 10-bit, 2 Msps | 10-bit, 2 Msps |
Key Differentiators
- Highest temperature grade (-H) in the dsPIC33FJ16GS502 family (vs DSPIC33FJ16GS502-I/SP)
- 32 KB Flash headroom in pin-compatible package (vs DSPIC33FJ16GS504-I/SP)
- Same SMPS peripheral set with cost-down memory (vs DSPIC33FJ16GS402-H/SP)
Design Notes
Route the high-speed ADC analog signals (current shunt, output voltage feedback) as short, guarded traces away from PWM switching traces and the switching node of the power stage. Place a 10 uF + 0.1 uF decoupling pair within 5 mm of each VDD pin and connect AVSS/AVDD through a ferrite bead isolated from the digital VDD. Use a continuous ground pour under and around the SPDIP body to provide a low-impedance return path for switching currents. Keep the MCLR trace short and add a 10 kohm pull-up to VDD; the MCLR pin is sensitive to noise coupling and may false-trigger reset if left floating during high-dV/dt transients.
Do not exceed the maximum VDD of 3.6 V; the DSPIC33FJ16GS502-H/SP is NOT 5 V tolerant on any I/O pin and will suffer latch-up damage if a 5 V signal is applied. The analog comparators share input pins with port B functions - configure the comparator assignment early in firmware before alternative peripheral mapping is requested, otherwise the comparator subsystem will silently disable the affected GPIO. The internal 7.37 MHz oscillator is sufficient for many designs but PLLs above 80 MHz output require careful VDD decoupling because the PLL loop is sensitive to supply ripple and may produce jitter on the PWM edges.
Estimated: at 50 MIPS CPU load and 3.3 V VDD, the DSPIC33FJ16GS502-H/SP core dissipation is approximately 60 mW. The SPDIP-28 package thermal resistance theta_JA is approximately 60 C/W on a 4-layer JEDEC test PCB, so the junction-to-ambient rise is approximately 3.6 C at full load. The -H grade silicon is rated to +150C junction, leaving substantial thermal margin even in a sealed enclosure. The dominant thermal constraint in real designs is not the DSC itself but the surrounding power MOSFETs and magnetics; ensure the DSC is not co-located directly above a heatsink.
Compliance Information
RoHS and REACH compliance per Microchip product page. AEC-Q100 automotive qualification status not explicitly stated in the verified web data and marked as 'unknown'. Lead-free and halogen-free per Microchip packaging specifications.
